Bump axios from 1.7.4 to 1.8.4 in /backend

Bumps [axios](https://github.com/axios/axios) from 1.7.4 to 1.8.4.
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v1.x/CHANGELOG.md)
- [Commits](axios/axios@v1.7.4...v1.8.4)

---
updated-dependencies:
- dependency-name: axios
  dependency-version: 1.8.4
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

backend/package-lock.json

@@ -62,7 +62,7 @@
     "@sentry/node": "^7.36.0",
     "@sentry/tracing": "^7.36.0",
     "@types/multer": "^1.4.11",
-    "axios": "^1.7.4",
+    "axios": "^1.8.4",
     "cookie-parser": "^1.4.6",
     "cors": "^2.8.5",
     "express": "^4.21.0",